| Patents for E21B 17 - Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings; Tubings (27,800) |
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| 10/18/2001 | US20010030046 Method of retarding sand build up in heavy oil wells |
| 10/18/2001 | US20010029807 Thread is coated with material having lower electrode potential than the steel material; corrosion fatigue resistance |
| 10/17/2001 | EP1144797A1 A method for mounting a casing shoe on a drilling apparatus |
| 10/17/2001 | EP1144796A1 Friction reducing tool and method for its use in a wellbore |
| 10/17/2001 | EP1144793A2 Method of lubricating and lubricant spraying apparatus |
| 10/17/2001 | CN2454522Y Deviation-proof grinding for sucker rod |
| 10/16/2001 | US6302223 Rotary drag bit with enhanced hydraulic and stabilization characteristics |
| 10/16/2001 | US6302215 Positioning and conveying well apparatus and method |
| 10/16/2001 | US6302213 Method for installing a water well pump |
| 10/16/2001 | US6302205 Method for locating a drill bit when drilling out cementing equipment from a wellbore |
| 10/16/2001 | US6302203 Apparatus and method for communicating with devices positioned outside a liner in a wellbore |
| 10/16/2001 | US6302199 Mechanism for dropping a plurality of balls into tubulars used in drilling, completion and workover of oil, gas and geothermal wells |
| 10/16/2001 | US6302140 Cementing head valve manifold |
| 10/11/2001 | WO2001075345A1 Fatigue-resistant threaded bevelled tubular element |
| 10/11/2001 | WO2001075263A1 A composite tube with embedded power conductors |
| 10/11/2001 | WO2001075262A1 Bend stiffener |
| 10/11/2001 | WO2001027434A3 Drill string member with bearings |
| 10/11/2001 | US20010027879 Combined logging and drilling system |
| 10/11/2001 | US20010027867 Electropolishing method for oil field tubular goods and drill pipe |
| 10/10/2001 | EP1143105A1 Directional drilling system |
| 10/10/2001 | EP1143104A1 A composite tube with embedded power conductors |
| 10/10/2001 | CN2453127Y 地锚 Anchor |
| 10/10/2001 | CN2453121Y Percussion type back-off sub |
| 10/10/2001 | CN2453112Y Quick action screw protector for petroleum sleeve |
| 10/10/2001 | CN2453111Y Screw connector escaping-proof device for spiral oil suction rod |
| 10/10/2001 | CN2453110Y High strength thin wall drilling rod |
| 10/10/2001 | CN2453109Y Wing like well pipe |
| 10/10/2001 | CN2453108Y Upset, escaping proof and solid type oil suction rod |
| 10/10/2001 | CN1317102A Optical fiber cable for use in harsh environments |
| 10/09/2001 | US6298921 Modular system for deploying subterranean well-related equipment |
| 10/09/2001 | US6298917 Coiled tubing system for combination with a submergible pump |
| 10/09/2001 | US6298883 Centralizer |
| 10/04/2001 | WO2001073331A2 Coiled tubing connector |
| 10/04/2001 | WO2001073261A2 Riser with retrievable internal services |
| 10/04/2001 | WO2001072464A1 Method of joining metal oilfield tubulars and well provided therewith |
| 10/04/2001 | WO2000043628A3 Rotary-type earth drilling bit, modular gauge pads therefor and methods of testing or altering such drill bits |
| 10/04/2001 | US20010026069 Corrosion-resistant thread joint for percussion drill element and method of achieving such resistance |
| 10/04/2001 | US20010025710 Method and apparatus for connecting a main well bore and a lateral branch |
| 10/04/2001 | US20010025664 Composite spoolable tube |
| 10/04/2001 | EP1138049A1 Cable arrangement |
| 10/04/2001 | EP0656127B1 Reduced diameter down-hole instrument cable |
| 10/04/2001 | CA2404881A1 Riser with retrievable internal services |
| 10/04/2001 | CA2403960A1 Coiled tubing connector |
| 10/04/2001 | CA2342594A1 Variable gauge stabilizer for directional drilling |
| 10/03/2001 | CN2451719Y Petroleum well screw drilling tool cardan shaft |
| 10/03/2001 | CN2451718Y Oil casing pipe taper thread joint |
| 10/03/2001 | CN2451717Y Packer type casing pipe rejoining device |
| 10/03/2001 | CN2451716Y Oil pipe anchor |
| 10/03/2001 | CN2451715Y Petroleum casing and oil-pipe high-pressure air sealing coupling structure |
| 10/02/2001 | US6296421 Emergency dump apparatus for buoyancy air tanks on buoyant riser systems |
| 10/02/2001 | US6296066 Well system |
| 10/02/2001 | US6295867 Geological sample sub |
| 09/27/2001 | WO2001071157A1 Subterranean well completion apparatus with flow assurance system and associated methods |
| 09/27/2001 | WO2001071155A1 Communicating with devices positioned outside a liner in a wellbore |
| 09/27/2001 | WO2001071153A1 A riser device |
| 09/27/2001 | WO2001071149A2 Drill bit stabilizer and method of use |
| 09/27/2001 | US20010023718 Corrosion resistant mainly martensitic microstructure |
| 09/27/2001 | DE10023467C1 Boring device, to form bores using borer tubes, has holder unit with rotation plate for borer tube having radial locking opening and has locking unit on plate with locking bolt to lock borer tube |
| 09/27/2001 | CA2403727A1 Drill bit stabilizer and method of use |
| 09/27/2001 | CA2402779A1 A riser device |
| 09/26/2001 | EP0832344A4 Down hole hammer assembly |
| 09/26/2001 | EP0697057B1 Drill bit and other downhole tools |
| 09/26/2001 | CN2450376Y Moveable joint |
| 09/26/2001 | CN2450372Y Combined casing joint for oil well |
| 09/26/2001 | CN2450371Y 旋转接头 Rotary joint |
| 09/26/2001 | CN2450370Y Butt joint for well pipe |
| 09/25/2001 | US6293360 Thread joint percussive drilling equipment |
| 09/20/2001 | WO2001069037A1 Multi-purpose float equipment and method |
| 09/20/2001 | WO2001069034A2 Wellbore circulation system, kelly bushing, kelly and tong |
| 09/20/2001 | US20010022241 Bottomhole assembly and methods of use |
| 09/20/2001 | US20010022223 Downhole cleaning tool with shear clutch |
| 09/20/2001 | CA2760857A1 Multi-purpose float equipment and method |
| 09/19/2001 | EP1133615A1 Tethered buoyant support for risers to a floating production vessel |
| 09/19/2001 | EP1014877A4 Titanium molybdenum hafnium alloys for medical implants and devices |
| 09/19/2001 | CN2448909Y Autoamtic, manual oil pipe stabilizer |
| 09/19/2001 | CN2448908Y Power head type drill slide board guiding mechanism |
| 09/19/2001 | CN2448907Y Turning-proof telescopic pipe |
| 09/19/2001 | CN1313927A Grouting pipe equipment and method of grouting using the same for an underground water well |
| 09/18/2001 | US6292627 Electrical heating of pipelines with pipe-in-pipe and mid-line connector |
| 09/18/2001 | US6290007 Rotary drill bits for directional drilling employing tandem gage pad arrangement with cutting elements and up-drill capability |
| 09/18/2001 | US6290005 Pneumatic impact damping device for a drill column |
| 09/18/2001 | US6290003 Controllable stabilizer |
| 09/18/2001 | US6290002 Pneumatic hammer drilling assembly for use in directional drilling |
| 09/18/2001 | US6289993 Blowout preventer protector and setting tool |
| 09/13/2001 | WO2001067466A1 In-well monitoring and flow control system |
| 09/13/2001 | WO2001066904A1 Centraliser |
| 09/13/2001 | WO2001066903A1 Threaded spacer |
| 09/13/2001 | WO2001066288A1 Method of assembling pipe joints |
| 09/13/2001 | WO1997027380A3 Method for forming a window in a tubular and apparatus for use in said method |
| 09/13/2001 | WO1997025518A3 Apparatus for setting a liner in a well casing |
| 09/13/2001 | US20010020530 Stand-off device |
| 09/12/2001 | EP1131533A1 Tubular filling system |
| 09/12/2001 | EP1131532A1 Downhole tool with extendable members |
| 09/12/2001 | EP1131531A2 Rotary cone drill bit having a bit body with integral stabilizers |
| 09/12/2001 | EP0954674B1 Drilling assembly with a steering device for coiled-tubing operations |
| 09/12/2001 | EP0656998A4 Shock absorbing assembly |
| 09/12/2001 | CN2447515Y Vibration-absorbing drill collar for drilling |
| 09/12/2001 | CN2447514Y Pumping rod centralizing pumping aid |
| 09/12/2001 | CN2447513Y Spherical roller pumping rod centralizer |
| 09/12/2001 | CN1312881A Device related to resers |